Scale solvent and sealing composition



raieaiea'lvia 28, 1929. i

pair

JOHN M. COUGHLIN, on Kansas CITY, MISSOURI, Assienoa r scams SOLVENT &

' raonno'rs COMPANY, A conr'onarron or rvrrssonar.

SCALE SOLVENT AND SEALING COMPOSITION.

No Drawing.

My invention relates to scale solvents and more particularly to compositions having the dual nature of solvent and sealer for water supply systems and boilers. I

My object is theproduction of a liquid combined solvent and sealer that will have improved qualities for these functions and that also may be safely introduced into pipe lines supplyingwater forcooking or drinking, or for any domestic purpose.

The new composition of matter thatI offer as embodying my invention consists of a soluble sealer and solvent preferably silicate of soda, to which coffee is added,thecomposition to be prepared in a manner to be explained. 1

I produce my composition primarily for introduction into a stream of water circulating in pipe systems involving heat, andmay provide proportions for various conditions for example for a steam producing circuit or a potable hot-watersupply'circuit, but I may adapt the composition for systems supplying unheated water.

Compositions for such purposes commonly comprise a soluble glass, and usually include sodium silicate, silicon and sodium oxide, elements which tend to dissolve and remove the scale and various sediments deposited by heated water on the interior surfaces of the pipes and that also having aninity for metals tions for increasing the solvent effect, andtannic acid is added chiefly as a coloring agent. It is believed that the tannic acid also has an influence in the favorable result both as to removing deposits and as to providing a protective seal. Each of the two commonly added agents, caustic soda and tannic acid, is objectionable for use insysterns supplying-water in preferably potable condition.

The composition I offer, which includes 7 the silicate elements previously well known in the industry, may receive the addition of caustic soda for'extreme instances of demand for scale dissolving but I .designitfor relatively constant formula as providing a solvent and seal having no deleterious effect on Application filed January 21, 1927. Serial N0. 162,6'78

the potabilityiof water treated, and therefore as havlnga wioe range of convenient and safe vutility for hospitals, oflice buildings, hotels, apartments, dwellings, and in fact any situation ,Wherewater heated for anyuse may be availableand used for cooking or drinking. I v I produce the composition having such utility by pro'vidingcoffee'asthe-coloring agent and the element contributing to fayorable results, and being able therefore to (:nspense with the prevlously widely used tannic acid. I I wish to call attention to the particular form in which'I prepare the cof- .1

fee for incorporation into the composition, though other methods may .latergbe found also GIIGCtlVG and convenient when study of the subject with data disclosed by'the use'of my invention has brought forth-further knowledge of the 7 reasons I for the results which practical experience andapplication For ex of general principles have attained. ample, an extract of coffee maybe substituted in suitable proportions for my liquid coffee constituent. I

Attention is called to an item of domestic science in this connection, namely, that vessels in which coffee is prepared sustain no scale deposits, and that the boiling'of coffee in, a tea kettletends to remove the scale that may be present therein.

Having provided the silicate elements, I prepare the coffee constituent by the percolative productiouof coffee, using one-half pound of pulverized coffee in substantially one gallon of water for the provision of one transferring the coffee to the silicate, in proportions within definite limits and gauged gallon of the said coffee constituent, and

complete straining out of all grounds from the liquid coffee.

mula is apparently required because of variation in the color and possibly in other qualities due to conditions which" I do not here detail, merely stating my opinion that the functional qualities tend to vary. di-.

rectly. as the color. I find that increasing or decreasing the proportion of cofieewithin a range of 25 percent from normahnieasuring the adjustment inversely by the great er or lessdepth of color of the coffee, produces a satisfactory composition.

The coffee element contributes no-adverse factor to the composition, and Water that has been treated by my composition is potable, even though small portions of my composition may be present in the supply used for cooking or drinking. v

My composition is produced in fifty gallon lots as a basis by providing substantially 40 gallons of a 42 Baum solution of liquid 7 silica, to which is added nine gallons of water and one gallon of .fresh strained liquid coffee. Such composition is designed for introduction into a domestic, hotel, hospital, or office building potable hot Water circulating system in ratio of one quart of the liquid composition to 10,000 gallons of Water, and to be so introduced preferably every 24 hours. I may modify the composition for steam production systems by the provision of silicate of vsoda of 50 Baum, and suggest the introduction of the composition into such steam system in the ratio of one vquart thereof to 100 horse power boiler capacity-each twelve hours of operation.

ascribed, comprising a liquid silicate andan I extract of cofieel.

What I claim and desire to secure by Letters Patent is:

1. A composition for the purpose de- 2. A composition of the class described, consisting substantially of silicate of soda and cofi'ee.

3. A composition of the class described,

a composition including substantially forty gallons of a 42 Bamn to Baum solution of soluble glass for sealing, and 111116 gallons of water, and one gallon of liquid 7 coffee for dissolving scale and coloring the composition, the liquid'coifee consisting of the extract from one-half pound of pul- Verized coffee beans. I

'7.- The process of coloring a soluble glass and adapting the same for use indomestic Water-circulating systems as a solvent and sealer, including the production of liquid coffee by the percolative method. straining the liquid coffee to remove solid particles, and adding the strained liquid coffee While fresh to the soluble glass. v

In testimony whereof I afiix my signature.

JOHN M. COUGHLIN. 

